/*
 * Copyright (C) 2008 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import javax.annotation.Nullable;

/**
 * @see com.google.common.collect.Maps#immutableEntry(Object, Object)
 */
@GwtCompatible(serializable = true)
class ImmutableEntry<K, V> extends AbstractMapEntry<K, V> implements Serializable {
    final K key;
    final V value;

    ImmutableEntry(@Nullable K key, @Nullable V value) {
        this.key = key;
        this.value = value;
    }

    @Nullable
    @Override
    public final K getKey() {
        return key;
    }

    @Nullable
    @Override
    public final V getValue() {
        return value;
    }

    @Override
    public final V setValue(V value) {
        throw new UnsupportedOperationException();
    }

    private static final long serialVersionUID = 0;
}
